Derivatives and Hedging Activities (Details) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011 Forward contracts [Member] Prepaid expenses and other assets [Member]	Dec. 31, 2010 Forward contracts [Member] Prepaid expenses and other assets [Member]	Jun. 30, 2011 Forward contracts [Member] Other assets [Member]	Dec. 31, 2010 Forward contracts [Member] Other assets [Member]	Jun. 30, 2011 Forward contracts [Member] Accrued expenses [Member]	Dec. 31, 2010 Forward contracts [Member] Accrued expenses [Member]	Jun. 30, 2011 Forward contracts [Member] Other non-current liabilities [Member]	Dec. 31, 2010 Forward contracts [Member] Other non-current liabilities [Member]
Fair value of forward contract recorded in balance sheet
Fair value of derivative assets					$ 47.3	$ 20.3	$ 82.3	$ 44.6
Fair value of derivative liabilities									8.4	22.7	2.3	11.6
Amounts recognized in other comprehensive income and reclassified from AOCI into earnings
Amount of gain/(loss) recognized in OCI, net of tax for the three and six months ended June 30,2011 of $ (7) and (29.7), respectively; net of tax for the three and six months ended June 30,2010 of $26.3 and 44.3, respectively	14.0	(57.9)	62.0	(88.5)
Amount of gain/(loss) reclassified from AOCI into sales	$ 6.7	$ (11.7)	$ 7.9	$ (16.9)